Sliver roll forming machine



April 1, 1941, G. s. FRASER SLIVER ROLL FORMING MACHINE 5 Sheets-Sheet 1 RT 2 EY W flu m h 0 m 0 G l u,

ATTORNE Y5 P 1, 1941. G. s. FRASER 2,237,071.

SLIVER ROLL FORMING MACHINE INVENTOR Gore/on 5C0?! Friser BY I A T TQRNEYS Filed Aug. 23, 1 940 5 Sheets-Sheet April 1,1941. G. s. FRASER 2.237.071

SLIVER ROLL FORMING-MACHINE Filed Aug. 23, 1940 5 Sheets-Sheet 5 INVENTOR Gordon Scuff/ 3150 A T TURN EYS I April 1, 1941.

e. s. FRASER SLIVER ROLL FORMING MACHINE Filed Aug 23, 1940 5 Sheets-Sheet 4 INVENTOR Gordan Sea/l Fm ATTORNEYS April 1, 1941. G. s. FRASER SLIVER ROLL FORMING MACHINE Filed Aug. 25, 1940 5 Sheets- Sheet 5' FIG. 6.

INVENTOR Gordon. Scof/ Frase Zw@4l#4; ,771WY /?M ATTORNEYS Patented Apr. 1, 1941 SLIVER ROLL FORMING MACHINE Gordon Scott Fraser, Arbroath,'Angus, Scotland, assignor to Douglas Fraser & Sons Limited, Arbroat-h, Angus, Scotland, a corporation of Great Britain and Northern Ireland App ication August 23, 1940, Serial No. 353,794

In Great Britain July 8, 1939 2 Claims.

with the lower rollers to rotate the roll during the formation of the roll.

A sliver-roll-forming machine according to the invention comprises two lower driven rollers and an upper driven movable roller disposed at the corners of an imaginary triangle and adapted to cooperate in winding a sliver roll around a central movable arbor, and means associated with the upper roller for arresting the rotation of said upper roller for the purpose of causing a completed roll to be ejected from the machine.

The arbor is preferably of the type comprising complementary axially-separable rotary sections which are automatically withdrawn axially, in opposite directions, from the roll when the latter attains a predetermined size and which are driven through the medium of a friction clutch.

The upper roller is preferably driven through the medium of a clutch incorporating a rollerbraking device which is brought into operation to arrest rotation of the upper roller when the clutch is disengaged.

The clutch through which the upper roller is driven is automatically disengaged, and rotation of the-upper roller discontinued, on attainment of a predetermined diameter by the sliver roll. In consequence of the stoppage of the upper roller while the lower rollers continue to rotate in the same direction, the sliver roll is delivered to the front of the machine. Figuratively, it walks out of the machine, the stopped upper roller dropping down on the rear shoulder of the roll which acts as a cushion.

The arbor sections are automatically withdrawn from the roll practically substantially simultaneously with the stoppage of the upper roller. In withdrawn position the arbor sections fall immediately, under the action of gravity, but move towards one another again when the roll is clear of the lower rollers, and land upon the sliver extending between the lower rollers, whereupon by engagement with outstanding surface pins on the arbor sections the sliver is broken from the previous roll.

In order to permit the lower rollers to take control of the roll-building operation as soon as possible, the arbor descends well into the depression or trough between the lower rollers, and a sliver core of small diameter only is wound upon the arbor before said core is engaged by the lower rollers at least, which thereupon take charge and prevent further overstretching of the sliver by the torque exercised by the arbor.

As is understood, during the roll-building operation, the rotation of the sliver roll is taken care of by the upper and lower rollers, while the rotating arbor exercises a compacting action on the roll.

A sliver-roll-forming machine according to the invention is illustrated in the accompanying drawings in which Fig. 1 is a side elevation showing the machine about to eject a completed sliver roll, Fig. 2 is a view at right angles to Fig. 1 constituting a front elevation of the machine, Fig. 3 is a side elevation showing the completed sliver roll in process of being ejected from the machine and the machine about to start a further roll-building operation, Figs. 4 and 5 are part elevations part vertical sections at right angles to each other drawn to a larger scale and showing details of the arbor sections and the drive thereto, and Fig. 6 is a part elevation part vertical section drawn to a larger scale of the upper roller, the clutch drive for said roller, and components of trip mechanism.

The sliver-roll-forming machine shown comprises three rollers, namely, an upper driven sliver-roll-pressing roller l and two lower driven sliver-roll-supporting rollers 2, 3, respectively arranged at the corners of an imaginary triangle and adapted to co-operate in winding a roll 4 of sliver upon an arbor including two complementary axially-separable rotary sections 5. 6 denotes the sliver delivered to the machine from the delivery rollers 'l of a sliver drawing frame (not shown) from which the rollers 2, 3 are driven through the medium of gearing indicated at 8-! 6.

The arbor sections 5 are journalled in a carrier which is slidable vertically on guides E8, the arbor sections 5 being driven from the gearing I l-l6 through the medium of spiral gearing I9, 20, a pair of vertical driving shafts 2|, and friction clutches 22 and spiral gearing 23, 24 mounted on the carrier ll. Arbor-carrying axially movable hollow-shafts 25 (Figs. 4 and 5) on which the gears 24 are slidingly feathered are adapted to be displaced axially by bell-crank levers 26 operatively associated one with each arbor section 5 and pivotally mounted on the carrier H, the levers 26 being operated as hereinafter described.

The upper roller I is provided with side flanges I and is journalled in a carrier 21 which also is slidable vertically on the guides I 8. The roller I is driven from one of the shafts 2I through the medium of a spring-loaded dog clutch 28 and spiral gearing 29, 30. 3I denotes an axially movable non-rotary braking sleeve associated with the clutch 28.

At the start of a roll-forming operation the carriers I I, 21 are located at the lower limit of their vertical travel as shown in Fig, 3; In this position of the carriers, the levers 26- engage fixed stops32 and the arbor sections 5, are in protruded or operative position and engage the sliver 6 stretched across the rol1 ers,Z: 3 whereby the sliver is broken from the completed roll 4! as the latter is ejected from the machine, as shown in Fig. 3. The sliver winds upon the rotating arbor sections 5 andsoon thereafter the r mnl e enc of t e mall, li er 1 n a e the three rollers I, 2 3 which thereupon take charge of the roll-forming operation. The arbor sections 5 and the roller I ascend as the diameter of the roll increases, the arbor sections 5 being so driven that the x rc se a u o compacting action on the core of the roll. When the sliver roll attains full diameter as shown at 4 in Fig, 1, one arrn33 01 a weighted trip lever 34 iv ted t 35; he c r i r 2 engages fixed stop 35, whereby the lever 34 rocks on its pivot 35 and a stud 31 on the arm 33 engages the arm 38 of a lever pivotedal so at 35 and having twin arms 39 which are rocked upwardly by depression of the arm 38 by the stud 3?. Depression of the arm; 33 causes the said arm to engage and depress the sleeve 3I in opposition to the action of the spring 28' of the clutch 28, whereby the lower dog element of the clutch 28 is declutched from the upper dog element thereof, and a brakingcollar 3 I' on the non-rotary sleeve 3| enters into braking engagement with the axially located gear; 29 and thus arrests rotation of the roller I. Upward rocking movement of the arms 39 causes pawlslil pivoted thereto to engage and displace upwardly vertically movableracks M operatively connected at their lower ends to rock levers 42 pivoted at 43 to the carrier I 1, whereby the levers 42 act on the arbor control levers 26 to withdraw the arbor sections 5 from the roll 4. In consequence of the stoppage of the roller I and of the withdrawal of the arbor sections 5 While the rollers 2, 3 continue their rotation, the sliver roll 4 is ejected to the front of the-machine, the roll being shown in the process of ejection at 4 in Fig. 3. As the roll walks out of the machine, the carriers 2''! and I! drop to starting position, the roller I being cushionedvin its descent by the back of the roll. When the levers 2 3 engage the stops 32, the arbor sections 5 are protruded to operative position to re-engage the sliver and the components 33, 34, 38, 39, 4| and 42 are restored to normal position by the arbor-restoring movements of the levers 26. Th clutch 28 is re-engaged and the brake collar 3| released by the action of the spring 28' when the arm 38 releasesthe sleeve 3|, and the pawls M) are rocked out of engagement with the racks AI when the pawls engage stops 44, asshown in Figs. 3 and 6.

I claim:

1. A sliver-roll-forming machine comprising a central movable arbor, two lower driven rollers and an upper driven movable roller disposed at the corners of an imaginary triangle and adapted to co-operate in winding a sliver roll around said arbor, means including a-clutch for driving the upper roller, said clutch incorporating arollerbraking device adapted to be broughtinto operation to arrest rotation of the upper roller on disengagement of said clutch.

2 A sliver-roll-forming machine as claimed in claim 1 in which the arbor comprises retractible sections and in which the upper roller and the arbor are mounted in vertically movable carriers with which. are associated trip mechanisms for disengaging the clutch and for eifecting retraction of the arborsections from the roll when the roll attains full diameter, and for r e-engaging the clutch and moving the arbor sections towards one; another on the descent of the carriers to operative position. if

GORDON SCOTT FRASER. 

